QPB8957 75 28dB CATV Doubler Amplifier 50 - 1003MHz Product Overview The QPB8957 is a GaAs pHEMT/MESFET 75-ohm Doubler RF amplifier IC featuring over 28dB of flat gain and low noise. This IC is designed to support applications up to 1003MHz using a single 24V supply. The QPB8957 offers low noise and low distortion at high efficiency consuming only 8.4W in a 5x7 QFN package. Its compact size and low jc enable integration that is ideally suited for hybrid module or an alternative to hybrid module 40 pin 5x7 QFN Package applications. Functional Block Diagram Key Features High Gain: 28dB 1003MHz Adjustable Bias RF +24V RC Filter V I LIN DD CTRL 50 - 1003 MHz BW I DD I DD 57dBmV/ch virtual 1.0GHz, at 15dB tilt RF IN RF OUT 75 75 Low Noise: 4.5dB QPB8957 Excellent Composite Distortion pHEMT / MESFET device technologies I DD I DD EP Compact Size: 40P 5x7 QFN RC Filter +24V RF Power Consumption (24V, 350mA 8.4W) Applications DOCSIS 3.0 Broadband CATV hybrid modules Head End CMTS Equipment 75-ohm amplifiers Ordering Information Part No. Description QPB8957SB Sample bag with 5 pieces QPB8957SR 7 Reel with 100 pieces QPB8957TR13 13 Reel with 2500 pieces QPB8957EVB 471003MHz PCBA Data Sheet Rev. E, July 29, 2021 - 1 of 13 - www.qorvo.com Subject to change without notice All rights reserved QPB8957 75 28dB CATV Doubler Amplifier 50 - 1003MHz Absolute Maximum Ratings Parameter Rating Supply Voltage (VDD) +28V (5min) Supply Current (IDD) 500mA Maximum Input Level (single tone) +70dBmV Operating Temperature Range -40 to +100C Storage Temperature Range 65 to +150C Maximum Junction Temperature +150C Exceeding any one or a combination of the Absolute Maximum Rating conditions may cause permanent damage to the device. Extended application of Absolute Maximum Rating conditions to the device may reduce device reliability. Electrical Specifications 24V (1) Parameter Condition Min Typ Max Unit Supply Voltage (V ) 24 V DD Supply Current (I ) V total current 350 mA DD DD Frequency Range 50 1003 MHz 2 Gain 1003MHz 28 dB Gain Flatness Max. deviation from line using least squares fit from 50 0.5 dB to 1003 MHz Gain Slope Gain(1003MHz) - Gain(50MHz) 1.0 dB Reverse Isolation -42 dB Input Return Loss 18 dB Output Return Loss 18 dB Noise Figure 4.5 dB CSO 80 NTSC + 72 QAM (-6dB offset), 56dBmV/ch virtual -79 dBc output at 1003MHz 15.6dB tilt CTB -78 dBc CCN 63.5 dB OIP2 Low band: 225MHz, 325MHz, 15dBm/tone 90 dBm High band: 900MHz, 950.5MHz, 15dBm/tone 85 dBm OIP3 Low band: 225MHz, 325MHz, 15dBm/tone 53 dBm High band: 900MHz, 950.5MHz, 15dBm/tone 49 dBm Output P1dB 1003 MHz 28 dBm Thermal Resistance 6 C/W JB (Junction to backside of QFN) Notes: 1. Typical performance at these conditions: Temp = +25C, V = +24V, 75 system, Full band unless otherwise noted DD Data Sheet Rev. E, July 29, 2021 - 2 of 13 - www.qorvo.com Subject to change without notice All rights reserved